package com.itheima.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName="loginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {
    //路径匹配器，支持通配符
    public  static final AntPathMatcher PATH_MATCHER=new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest) servletRequest;
        HttpServletResponse response=(HttpServletResponse) servletResponse;
        String requestURI = request.getRequestURI();


        log.info("拦截到请求：{}",requestURI);
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/frout/**",
                "/common/**",
                "/user/login"
        };
        boolean cheak = cheak(requestURI,urls);
        if(cheak){
            log.info("本次{}不需要处理",requestURI);
            filterChain.doFilter(request,response);
            return;
        }
        if(request.getSession().getAttribute("employee")!=null){
            log.info("用户已经登录，用户id为：{}",request.getSession().getAttribute("employee"));

         Long empId= (Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);
            filterChain.doFilter(request,response);
            return;
        }

        if(request.getSession().getAttribute("user")!=null){
            log.info("用户已经登录，用户id为：{}",request.getSession().getAttribute("user"));

            Long userId= (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);
            filterChain.doFilter(request,response);
            return;
        }



    log.info("用户未登录");
    response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));

      return;

    }
public boolean cheak(String requestURI,String[] urls){
    for (String url:urls){
        boolean match = PATH_MATCHER.match(url, requestURI);
        if(match){
            return true;
        }
    }
    return false;
}

}
